Modulation of Circumstellar Extinction in a Young Binary System with a Low-Mass Companion in a Noncoplanar Orbit

Abstract

The cyclic activity model of a young star with the low-mass secondary component (q = M2/M1 <= 0.1) accreting a matter from circumbinary disk is considered. It is assumed that the orbit is circular and the disk and orbital planes are non-coplanar. Sets of hydrodynamics models of such a system have been calculated by the SPH method and then the variations of the circumstellar extinction and phase light curves were determined. The calculations showed that depending on the model parameters and orientation of the system in regards to an observer the different in shape and amplitude light curves can be observed. An important property of the considered models is also the dependence of the mass accretion rate onto the components on the phase of the orbital period. The results of the calculation can be used for analysis of the cyclic activity of UX Ori stars and young stars with the long-lasting eclipses.

14 pages, 7 figures

References in corpus (3)

• The unusual pre-main-sequence star V718 Per (HMW 15)
• Hydrodynamic Processes in Young Binary Systems as a Source of Cyclic Variations of Circumstellar Extinction
• The Recurrent Eclipse of an Unusual Pre--Main-Sequence Star in IC 348

Cited by in corpus (8)

• An active asteroid belt causing the UX Ori phenomenon in RZ Psc
• Reverse Rotation of the Accretion Disk in RW Aur A: Observations and a Physical Model
• Structures in circumbinary disks: Prospects for observability
• Asymmetric Illumination of a Circumbinary Disk in the Presence of a Low-Mass Companion
• On the nature of the azimuthal asymmetry of protoplanetary disks observed pole-on. The case LkHa 101
• "Horseshoe" Structures in the Debris Disks of Planet-Hosting Binary Stars
• SPH simulations of structures in protoplanetary disks
• Simulation of the Free Fall of a Gas Stream on a Protoplanetary Disk